serta icomfort and tempur-pedic go head-to-head with three years' interest-free financing, plus free same-day delivery, setup, and removal of your old set. when brands compete, you save. mattress price wars ends soon at sleep train. ♪ your ticket to a better night's sleep ♪ >>> the shooting in which 13 people were killed, has revealed what may be a serious lack of security at government facilities. justice correspondent pete williams joins us live from washington. >> a government audit, tamron, says some of the roughly 13,000 private contractor guards assigned to protect federal buildings don't have all of the training they need on what to do in response to an active shooter. since 2010 the department of homeland security required that the guards receive active shooter training and the government accountability office told congress today it did a spot check of contractors and found five companies who say their guards received no such training, 11 other contractors surveyed said the guards they provide did get at least some active shooter training. dh officials testified today at